Pneumatic motor



June 10, 19240 1,497,314

o. H. ANDERSON r PNEUMATIC mo'roa Filed Feb.'12, 1923 snezs-s'neez 1Uamrfl 777762 6715077, v

June 10, 1924. 1,497,314

I O. H. ANDERSON PNEUMATIC MOTOR Filed Feb. 12 1925 3 Sheets-Sheet. 2

- June 10. 1 24: 1,497,314

C. H. ANDERSON PNEUMATI C MOTOR Patented June 10, 1924.

OSCAR H. ANDERSON, OF GRAND HAVEN, MICHIGAN, ASSIGNOB TO STORY 85 CLARKPIANO 00., OF GRAND HAVEN,'IYIICH.IGAI\I, A CORPORATION OF ILLINOIS.

- PNEUMATIC MOTO'R.

Application filed February 12, 1923.

To all whom it may concern:

Be it known that I, OSCAR H. ANonasoN, a citizen of the United States,residing at Grand Haven, in the county of Ottawa and State of Michigan,have invented a new and useful Improvementin Pneumatic lt lotors, ofwhich the following is a specification.

This invention relates to improvements in pneumatic motors. For thepurpose of illustrating my invention I have shown'a pneumatic motor ofthe type ordinarily used for operating musical instruments such-forexample as player-pianos.

My improved motor can be easily and l cheaply made andwill be found tobe efficient and quiet in operation. It is so constructed that therewill be a minimum of wear on the different parts and also the de siredflexibility. The motor is especially adapted for use in connection withmechanical -musical instruments such as player pianos.

The features and advantages of my invention will appear in the followingspecification and drawings in which Fig. 1 is a view in front elevationof a pneumatic motor embodying the features of my invention. Fig. 2 is aview of the same in end elevation. Fig. 3 is a view taken as indicatedby the line 3 of Fig. 1. Figs. at, 5, and 6 are views similar to Fig. 3showing the bellows in different positions. Fig. 7 is a view similar toFig. 5, showing a modified form and Fig. 8 is a similar view showinganother modified form of device.

As shown in the drawings, the motor comprises in general a plurality ofdouble bellows here shown as three in number indicated by A B and Crespectively. These bellows are provided in'the ordinary manher withconnecting rods 10, operating on the cranks 11 to drive the shaft 12.Slide valves of ordinary form, as indicated by 13 operatedfby the valverods 14 are also provided. 15 indicates a manifold, and 16 and 1.7 arethe ports leading to the upper and lower pneumatic respectively of eachdouble bellows. My invention lies in the particular construction of thedouble bellows itself and will be described more in particularhereinafter.

Since each of the bellows is similar in construction I will describe indetail but one.

The double bellows A is shown in cross Serial No. 618,533.

lower ends of the swinging and fixed members 20 and 21 to form a hingejoint.

The lower pneumatic A consists of'the swinging member 30 and fixedmember 31, .bellows material 32 and hinge 33 which are similarlyarranged.

The two pneumatics are connected together by means of a board or strip40, which is secured to the swinging member 20 by means of the screws11. Since the pivot lines 23 and 33 of the upper and lower neumaticsrespectively do not coincide, means must be provided for permitting playbetween the swinging member 30 of the lower pneumatic and the connectingmember 40. Such means comprise a hook 42 at the lower end of theswinging member 30 which engages the lower end of the strip orconnecting member 40. This hook is loose enough to permit separation ofthe members 40 and 30 and also sliding movement of each with respect tothe other. The hook 42 is preferably made out of a piece of sheet metaland may be attached to the member 30 by means of the screw 44, the headof which I have here shown as being accommodated in a recess 45 in theunder side of the connecting member 40, such recess being of sufiicientsize to permit the movements of the members 40 and 30 with respect toeach other above mentioned.

The construction above described permitting play and movements betweenthe members 410 and 230 permits the use of ordinary rubber cloth striphinges on both the upper and lower pneumatics at 23 and 33 respectively.That is, each of the hinges 23 and 33 may be of the common form pivoting on straight lines, without any looseness or fullness.

The operation of the device may be better understood by reference toFigs. l, 5 and 6 which show the bellows in three different positions. InFig. 4 the lower pneumatic is fully expanded, and there appears the fullseparation between the members 10 and 30. In Fig. 5 the pneumatics areequally expanded with the result that the swinging member 30 is somewhatcloser to the con necting strip 40. In 6, the lower pneumatic is shownat the limit of its deflated position, and in this position the swingingmember 30 is practically against the connecting strip 40.

In order to give ample room for the collapsing of the lower pneumatic A,I have made the swinging member 20 slightly thicker than the swingingmember 30. Such accommodation for the members 30 and 31, when the lowerpneumatic A is fully compressed, may, however, be provided in otherways. For example, as shown in Fig. 7, the stationary member 81(corresponding to the member 31 in the pre ferred form) may be slightlydepressed, or set down a little lower or a little iurther into thesupporting block or member 80. Such depression is provided by formingthe depression 81 in block 80. Or if desired, as shown in Fig. 8, themember 31 (corresponding to the member 31 in the pre ferred form) may bemade a little thinner than the member 21.

\Vhile I have shown and described certain embodiments of my invention,it is to be understood that it is capable of many modifications. Changestherefore in the construction and arrangement may be made withoutdeparting from the spirit and scope of the invention as disclosed in theappended claims, in which it is my intention to claim all noveltyinherent in my invention as broadly as possible in view of the priorart.

lVhat I claim as new, and desire to secure by Letters Patent is:

1. A pneumatic motor having a double bellows comprising a pair ofpneumatics with their hinged ends adjacent, each pneumatic having afixed member and a swinging member, a connecting member rigidly attachedto the swinging member of one pneumatic, and a loose connection betweensaid connecting member and the swinging member of the other pnuematic."

2. A pneumatic motor having a double bellows comprising a pair orp'neumatics with their hinged ends adjacent, each pneu- 'matic having afixed member "and a swinging member, connecting member rigidly attachedto the swingingmember of one pneumatic, and means for connectingsaidconnecting member to the swinging member of the other pneumatic, saidmeans permitting the requisite movement between said members caused bythe operation of the bellows. c

3. A pneumatic motor having a double bellows comprising a pair ofpneumatics with their hinged ends adjacent, each pneumatic having afixed member and a swing ing member, a connecting member rigidlyattached to the swinging member of one pneumatic, and a loose connectionbetween said connecting member and the swinging member of the otherpneumatic, said connection comprising a hook attached to the end of theswinging member and engaging the end of the connecting member.

4. A pneumatic motor having a double bellows comprising a pair ofpneumatics with their hinged ends adjacent, each pneumatic having afixed member and a swinging member, a connecting member rigidly attachedto the swinging member of one pneumatic, and a connection between saidconnecting member and the swinging member of the other pneumaticpermitting separation of said members.

A pneumatic motor having a double bellows comprising a pair ofpneumatics with their hinged ends adjacent, each pneumatic having afixed member and a swinging member, a connecting member rigidly attachedto the swinging member of one pneumatic, and a connection between saidconnecting member and the swinging member of the other pneumaticpermitting sliding of said members with respect to each other.

6. A pneumatic motor having a .double bellows comprising a pair ofpneumatics with their hinged ends adjacent, each pneumatic having afixed member and a swinging member, a connecting member rigidly attachedto the swinging member of one pneumatic, and a connection between saidconnecting member and the swinging member of the otherpneumaticpermitting separation of said members :and vsliding oft-he samewith respect to each other- In witness whereof l. have hereunto .set

my handthis 7th day ofFebruary A. D.

:1 foscan aNnnrisoni-i

